您要查找的是不是：
- reduction relay valve 减压中继阀
- hydraulic relay valve piston cup 液压继动阀活塞皮碗
- hydraulic relay valve return spring 液压式继动阀回动弹簧
- The relay valves which are used at the end of long pipelines can quickly fill gas cells with compressed air, for example, in trailer or semitrailer brake systems. 继动阀用于长管路的末端，使储气筒的压缩空气快速充满制动气室，如在挂车或半挂车制动系统中。
- The anchor man in a relay team runs last. 接力队中的主力跑最后一棒。
- Six teams competed in yesterday's relay race. 六个队参加了昨天的接力赛。
- Have you turned off the water valve? 你关掉水阀了吗？
- She want to relay the carpet in her new home. 她想重新铺设她新房子的地毯。
- The reduction of unemployment should be paramount. 降低失业率应是头等大事。
- The concert was broadcast by relay. 这场音乐会是实况转播的。
- She wanted to relay the carpet in her new home. 她想重新铺设她新房子的地毯。
- A new relay of horses was harnessed to the cart. 用作轮换的马都已套到了那辆马车上。
- We need an eye bolt to fit this valve. 我们需要一个有眼螺栓来固定这个阀门。
- He soon detected the faulty valve. 他很快查到了出毛病的阀门。
- The forthcoming talk hold out the hope of real arms reduction. 即将举行的会谈给实现真正的裁军带来了希望。
- Queue forme at the ticket office when the news of the fare reduction get out. 票价下调的消息一传出，售票处前就排起了队。
- A reduction in pace, force, or intensity; a slowdown. 减慢，放松速度、力量或强度减弱; 放慢
- What reduction will you make on this article? 这个东西你要减价多少?
- The pump sucks air out (of the vessel) through this valve. 这台泵通过这个阀门把(容器中的)空气抽出。
- An electrical relay used to control the flow of power in a circuit. 开关一种用来控制电路中电流量的电流器件
